Return of a leaking device

I bought a vape (subox mini) at evolution vape in fourways on 01-09_17 then I started using after a week it was leaking I went to the store and I was told to leave the device at the store and I was called after two days the lady told me that it's working perfectly, I took the device back to try it out after two days I experienced the same problem again and went back to the store again and I was called and she said that the device is working perfectly again only to find out that it was not,she contacted hey regional manager and the manager changed the coil which didn't stop the device from leaking then I returned the device again and I was told that the device is working perfectly. basically I was not helped and now I have a device that is leaking and I definitely not happy with it